Galatians 5:1 is a great synopsis of Paul's letter to the Galatian church. He is reminding them (and us) to hold on tightly to the liberty of freedom that was accomplished once and for all by Christ on our account. Furthermore, he admonishes us to not be entangled in the terrible yoke of slavery that sin can so easily bring.
The double clap in the chorus is where you can have some real fun. Have the kids make the first clap behind their head and the second under their right knee. Mix it up with different variations and have them jump up and down during the word "yo..yo..yo" just like a YoYo.