net catch birds
罿 centers on a specific type of net used for catching birds, a specialized trapping tool.
罿 combines 罒 (net) with 童, which likely contributes the sound. The character is a phono-semantic compound for a bird-catching net.
The top 罒 is a net, and the bottom 童 looks like a child or a standing figure. Imagine a net set up to catch birds, with a child-like scarecrow nearby to lure them in.
For ショウ, picture a show where a net is used to catch birds on stage: show -> ショウ, and the net drops dramatically.