The ABA's Teach Children to Save program has a lesson for kiddos that age, it's free you just have to "register". Silly Sam's savings was a hit for our local kindergarten class.
Ask the teacher if they have any documentation on how many children qualify for government assistance (daycare tuition or lunches). If they don't track that, I've had success using the local elementary schools free and reduced lunch percentage.
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I don't need any more negativity in my life...be positive and helpful people or I will kick you in the shins!!!