diff --git a/Facepunch.Steamworks/Structs/UgcAdditionalPreview.cs b/Facepunch.Steamworks/Structs/UgcAdditionalPreview.cs
new file mode 100644
index 0000000..49e6e34
--- /dev/null
+++ b/Facepunch.Steamworks/Structs/UgcAdditionalPreview.cs
@@ -0,0 +1,33 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Steamworks.Data
+{
+	public struct UgcAdditionalPreview
+	{
+		internal UgcAdditionalPreview( string urlOrVideoID, string originalFileName, ItemPreviewType itemPreviewType )
+		{
+			this.UrlOrVideoID = urlOrVideoID;
+			this.OriginalFileName = originalFileName;
+			this.ItemPreviewType = itemPreviewType;
+		}
+
+		public string UrlOrVideoID { get; private set; }
+		public string OriginalFileName { get; private set; }
+		internal ItemPreviewType ItemPreviewType { get; private set; }
+
+		/// <summary>
+		/// Flags that specify the type of preview an item has:
+		/// Image = 0,
+		/// YouTubeVideo = 1,
+		/// Sketchfab = 2,
+		/// EnvironmentMap_HorizontalCross = 3,
+		/// EnvironmentMap_LatLong = 4,
+		/// ReservedMax = 255
+		/// </summary>
+		public int GetItemPreviewType() => (int)ItemPreviewType;
+	}
+}
diff --git a/Facepunch.Steamworks/Structs/UgcAdditionalPreview.cs.meta b/Facepunch.Steamworks/Structs/UgcAdditionalPreview.cs.meta
new file mode 100644
index 0000000..511f7d5
--- /dev/null
+++ b/Facepunch.Steamworks/Structs/UgcAdditionalPreview.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 48f086235d5dbeb44bccbb40802e30fb
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Facepunch.Steamworks/Structs/UgcItem.cs b/Facepunch.Steamworks/Structs/UgcItem.cs
index a386486..fb63898 100644
--- a/Facepunch.Steamworks/Structs/UgcItem.cs
+++ b/Facepunch.Steamworks/Structs/UgcItem.cs
@@ -108,6 +108,15 @@ namespace Steamworks.Ugc
         /// The number of downvotes of this item
         /// </summary>
         public uint VotesDown => details.VotesDown;
+		/// <summary>
+		/// Dependencies/children of this item or collection, available only from WithDependencies(true) queries
+		/// </summary>
+		public PublishedFileId[] Children;
+
+		/// <summary>
+		/// Additional previews of this item or collection, available only from WithAdditionalPreviews(true) queries
+		/// </summary>
+		public UgcAdditionalPreview[] AdditionalPreviews { get; internal set; }
 
         public bool IsInstalled => (State & ItemState.Installed) == ItemState.Installed;
 		public bool IsDownloading => (State & ItemState.Downloading) == ItemState.Downloading;
@@ -382,7 +391,19 @@ namespace Steamworks.Ugc
 		{
 			return new Ugc.Editor( Id );
 		}
-		
+
+		public async Task<bool> AddDependency( PublishedFileId child )
+		{
+			var r = await SteamUGC.Internal.AddDependency( Id, child );
+			return r?.Result == Result.OK;
+		}
+
+		public async Task<bool> RemoveDependency( PublishedFileId child )
+		{
+			var r = await SteamUGC.Internal.RemoveDependency( Id, child );
+			return r?.Result == Result.OK;
+		}
+
 		public Result Result => details.Result;
 	}
 }
diff --git a/Facepunch.Steamworks/Structs/UgcQuery.cs b/Facepunch.Steamworks/Structs/UgcQuery.cs
index 7401225..79893bb 100644
--- a/Facepunch.Steamworks/Structs/UgcQuery.cs
+++ b/Facepunch.Steamworks/Structs/UgcQuery.cs
@@ -152,6 +152,8 @@ namespace Steamworks.Ugc
 				ReturnsKeyValueTags = WantsReturnKeyValueTags ?? false,
 				ReturnsDefaultStats = WantsDefaultStats ?? true, //true by default
 				ReturnsMetadata = WantsReturnMetadata ?? false,
+				ReturnsChildren = WantsReturnChildren ?? false,
+				ReturnsAdditionalPreviews = WantsReturnAdditionalPreviews ?? false,
 			};
 		}
 
diff --git a/Facepunch.Steamworks/Structs/UgcResultPage.cs b/Facepunch.Steamworks/Structs/UgcResultPage.cs
index 86a6e2b..03399b5 100644
--- a/Facepunch.Steamworks/Structs/UgcResultPage.cs
+++ b/Facepunch.Steamworks/Structs/UgcResultPage.cs
@@ -15,6 +15,8 @@ namespace Steamworks.Ugc
 		internal bool ReturnsKeyValueTags;
 		internal bool ReturnsDefaultStats;
 		internal bool ReturnsMetadata;
+		internal bool ReturnsChildren;
+		internal bool ReturnsAdditionalPreviews;
 
 		public IEnumerable<Item> Entries
 		{
@@ -73,8 +75,36 @@ namespace Steamworks.Ugc
 							}
 						}
 
-						// TODO GetQueryUGCAdditionalPreview
-						// TODO GetQueryUGCChildren
+						uint numChildren = item.details.NumChildren;
+						if ( ReturnsChildren && numChildren > 0 )
+						{
+							var children = new PublishedFileId[numChildren];
+							if ( SteamUGC.Internal.GetQueryUGCChildren( Handle, i, children, numChildren ) )
+							{
+								item.Children = children;
+							}
+						}
+
+						if ( ReturnsAdditionalPreviews )
+						{
+							var previewsCount = SteamUGC.Internal.GetQueryUGCNumAdditionalPreviews( Handle, i );
+							if ( previewsCount > 0 )
+							{
+								item.AdditionalPreviews = new UgcAdditionalPreview[previewsCount];
+								for ( uint j = 0; j < previewsCount; j++ )
+								{
+									string previewUrlOrVideo;
+									string originalFileName; //what is this???
+									ItemPreviewType previewType = default;
+									if ( SteamUGC.Internal.GetQueryUGCAdditionalPreview(
+										Handle, i, j, out previewUrlOrVideo, out originalFileName, ref previewType ) )
+									{
+										item.AdditionalPreviews[j] = new UgcAdditionalPreview( 
+											previewUrlOrVideo, originalFileName, previewType );
+									}
+								}
+							}
+						}
 
 						yield return item;
 					}