Had when i worked in a preschool and kids love them! I would use colored sand instead of white salt. DIY salt tray with alphabet cards. Easy to make and kids have fun smoothing out the salt after correctly making the letter
Silky soft play dough for kids using 2 ingredients: 1 cup conditioner (cheaper the better), 2 cups cornflour/cornstarch, glitter (optional). I was just thinking about affordable gluten-free play dough.
Simple and effective. Paper plates are a must! Sparkly Paper Plate Angel - for Sunday School I'd let the kids paint glue around edge and then sprinkle clear glitter or silver. Add a ribbon to hang. Write Bible verse on plate?