Balloon Tennis... Easy and cheap entertainment! -- 29 clever activities for kids that parents will actually enjoy doing, too!
How to make a homemade bouncy ball
Rabbit hole activity- step in and out of raised hoop without knocking it off, crawl under hoop, jump in, etc
I use this list all the time a list of Funny Icebreaker Questions that can be used with any age group even in staff meetings
The Hand Game: An After School Circle Game - a fun game to play with elementary students to begin a class period and to help students calm down by focusing themselves on the game.
Straw Weaving -- 29 creative activities for kids that adults will actually enjoy doing, too!
Fold these free "fortune tellers" into social skills games for conversation, etc. Nine different varieties.
Improv Games for a High School Drama Class thumbnail
17 Old-School Games
Some awesome apps to help teach science and make it fun for kids of all ages. Lots of different sites for every lesson plan imaginable in the science subject!