I have a 10 month old grandson and a 3 1/2 year old grandson and I wanted something for both boys to be able to play with either by themselves or together.  The Fun Tube is just the right toy for this.  The 10 month old crawls through easily and the 3 1/2 year old crawls after him and vice versa and lets them play together for a while and seems to break the age difference down.  They play wonderfully together with the Fun Tube!!