Wish I was old enough to wield a cane, so I can hit young people all day without repercussions. For now an umbrella based on the amber cane from Jurassic Park will suffice, mostly because it should still do a lot of damage to those meddling kids.
The canopy would have a Jurassic Park logo of some kind, probably something along the lines of “Welcome to Jurassic Park” or another John Hammond quote. Sorry for being lazy and not adding a graphic to the canopy.
Dave's Geeky Ideas 
I had the exact same idea which is how I found this! have you seen anyone online willing to make this?
No takers! There are plenty of YouTube videos showing how to make your own cane, so modding an umbrella should be possible as well.