Parents day at school (pre k)

I'm going in for parents day at DDs school. Each day 1 parent comes in and interacts with the kids and talks about what they so. I'm a SAHM But I am also a WAHM. I'm a party planner and I make custom party goods. I'm extremely crafty too. I want to make something to give to the students but I'm not sure on what to do. I was going to make rainbow crayons but I don't have a heart mold (any ideas on where I could get 1?). Any suggestions would be wonderful!!

I've gotten heart molds at Walmart before. Most places probably have them with vday. Try michaels?