*This post contains affiliate links. Read more. We’ve shared quite a few fun core strengthening activities for kids here at The Inspired Treehouse: Crab Walking, Snake Charmer, and Flying Feet to name a few. We even came up with a whole list of great core strengthening exercises for kids. Today, we have another exercise that is used frequently in therapy gyms. It’s AWESOME for core strengthening and fun too! I think adults could even get in on the action (and benefits) of this one! Ladies and gentlemen...The Crab Crossover! What you'll need: -beanbags (or stuffed animals or coins or ... Read More about CHILD DEVELOPMENT QUICK TIP: CORE STRENGTHENING EXERCISES FOR KIDS