Gender reveal, help

I will be having my gender reveal soon, and my husband wants a reveal that has something to do with either nunchucks or boxing gloves where he would obviously hit something, but I’m having a hard time figuring out what we should make for him to hit..

we also don’t have a tree in our backyard to hang whatever it will be. Any suggestions one how we should go about this?

I will be standing on the side with my two boys while he does the reveal.