Ds is allowed to press the remote for our garage door once he has got onto his booster seat and let me strap him in without messing about.
The other day he messed about, threw the contents of my handbag everywhere and was laughing at me. So I told him unless he behaved that minute he wasn't going to his music group. instant behaviour and in the seat in seconds.
My mum then asked him if he would like to open the garage door and was very miffed when I announced that he couldn't because he'd messed about. Ds was devastated (for a minute anyway) but he has gone in the seat no messing since.