Is this will harm the metal body?

My little son keeps holding the mobile very tight but without bending it just holding it is this will harm the metal body or the plastic pieces under the metal back cover? Fortunately I didn't hear any sound of cracking or glue come loose. i saw that the back cover is running down clips and attached to it so i think pushing on the frame or holding the mobile tight is not harming it because i'm not pushing on plastic or flexible material it's aluminum.