Do i absolutely have to grow up?

it's like ive lost my imagination. just a coupls year ago i was playing with toys and stuff. now i'm too old for everything. i want my imgaination back! i still have toys i played with LAST YEAR! now all of a sudden i don't like playing with toys anymore. my friends and i still play with playdough and stuff sometimes. there was this childrens place that i liekd to go with my parents taht had diffrent rooms with stuff to do like moon sand exhibit, farm, construction, etc. I miss being able to play with toys and now all of a sudden if i do play with toys evryone will think im mental or something. help! i dont want to grow up! (im 13)