It says in the Rema in OC Siman 98 Sif 1 that it's ossur to kiss a child in shul. There are perhaps exceptions to this rule and cases where it would be allowed however that's that it says in the Rema ...
Is it wrong to wear a necklace of a magen david (star of David)? Would that be idolatry? And what if I kiss it? Will it then be idolatry?