Activities in/near State College for toddlers?

Does anyone have any resources they could provide on where to find or sign up for various classes or activities for a 2.5/3 year old? For example, swim classes, sports classes (soccer, tee-ball, etc), gymnastics, art? Things like that. I'm not really sure where to look! Bonus points if any of these things are offered on weekends 😊. TIA!