When a DIY is available, tap the blue house icon at the bottom left corner and select "Studio".
To participate, win levels to collect Gloves and use them to restore the item. Gloves do not carry over to the next event.
After restoring the item, you can place it in one of your rooms. You can only place it in a room you have already completed. It will not cost you Coins to replace an existing item with your new DIY item.
Select the room you want to place your new item in:
Tap on the highlighted item:
Your restored item will show as a 4th option:
If you don't have an event, the event may not be active or available to you at this time.