I was taught to put as little non-food items in children's cakes as possible. For example, when possible use pretzel sticks instead of skewers so a child doesn't grab a decoration, try and monch into it, and hurt themselves
Edit: if pretzel sticks aren't useful maybe something like a candy stick like these: (it'll be a hard monch but at least it's made to monch and won't harm their mouths as much as a skewer would) https://smile.amazon.com/dp/B08TGJPPK1/ref=cm_sw_r_cp_apa_glt_fabc_RFE2VF6XNFSFTP8J82ES