What did you love when you were little? What films did you watch on Video (do you remember those!)? What TV programmes did you watch? What toys did you play with? What games did you play?
When I was little I used to play imaginary games. Weren't they the best! I would pretend I was a mermaid, but when I was out of the water (and dry) I could fly like Peter Pan. Logical I think.
I recon I was definitely more inventive then than I am now, so every so often I delve back into my memories and come up with some inspired story ideas. In fact, I used my favourite childhood panda bear (Smilie) as subject for my art this year too.
Childhood fun and games doesn't have to just be memories. Use it to inspire what you do know. What will you find?