Build a roller coaster for a ping pong ball out of straws, hot glue, and a cardboard box for a base. This STEM challenge for kids is awesome because the materials are so simple and inexpensive! The track is surprisingly sturdy, and kids will have a blast
How to lock iPAD or iPhone Screen, so Children Stay within the App You Want Them to? - No More Accidental App Deletion or Unwanted App Re-arrangement! -- very helpful iPhone iPad tips for parents and teachers.