As OP is asking something that can be chanted by Kid (or not?), I know only two of them which I think a kid can chant, and I was told as a kid!
Many might already know about it, Shubham Karoti is a short shloka which is dedicated to oil lamp. Its meaning is straightforward, it can be chanted by anyone after enlightening the oil lamp at evening....
Here are few prayers for Lord Dhanvantari who is an Avatara of Lord Vishnu.
śankham cakram jalaukam dadhad amṛta ghaṭam cāru dorbhis
chaturbhiḥ|sūkṣma svachhan hṛdayaṁśuka parivilasan maulim ambhoja
netram || kālam bhodojjvalāṅgam kaṭi taṭa vilasac cāru pitāmbarāḍyam |
vande dhanvantarim tam nikhila gada vana prauḍa dāvāgni nīlām ||
Salutations to ...