Give 1 person in the class 10 pieces of candy. Then ask them if they’ll give one back to you, before they eat any of them. It should be easy to share 1 piece, since you’ve just given them ten. In contrast, give someone else ten pieces of candy (something small- like an m&m) and have them eat 9 of them before you ask for their last piece of candy. Explain that all we have comes from the Lord, all he asks is that we give 10 percent back in return. This is much easier if we give back before we are down to our last funds. Plus paying the Lord first allows him the opportunity to bless us further.