labor of love
something done for personal pleasure and not for money
The man's painting is a labor of love and he does not expect to make any money from it.
Rules to play Trampolining
Using the trampoline
Never allow more than one person on the trampoline at the same time.
Children under 6 must only use trampolines designed for their age range and size, trampolines are not suitable for very young children and toddlers.
Always supervise children.
No somersaults go to a properly organised club if you want to try more complicated moves.
Never allow the use of bouncing to exit the trampoline.