We always get a nice plant and insert a wire tree in the middle and attached money (money tree)and blend in the green leaves in wires to cover. Sometimes just get a clay pot and weight it down put silver dollars and the paper money (clipped at middle to form leaves), put in a clear gift bag.
Or buy a small fake tree and attach money to end of leaves . I use these all the time for teens who seem to think money grows on trees. My son who is 21 still enjoys his "money tree"
I guess I'm weird or something - but giving money always makes me squeamish - especially to adults.