tunnel for sure....the big nylon ones that you can pull together and tie up when not playing with it....kids of all ages LOVE the tunnel. crawling to school age. They also LOVE dress up bin...I go right after halloween and catch all the outfits 75 to 90% off. They also LOVE the kitchen and all the food that goes with. Also, doll houses and furniture, toys, dolls that go inside. any kid of building toys, blocks, mega legos, pipe toys..any thing that can be attached to create and use imagination. and BALLS....kids love balls, throw roll play with. I also have this fire truck that opens up into a tiny city and has small cars to drive around inside....the 2-5 yr old can't wait for me to give them the go ahead to drag that out also, they could play for hours with it!