This one's a real treat if you're babysitting and on a budget!

You'll need:
1) A bag of fries (about 2$)
2) A pack of hotdogs (1$)
3) A package of hotdog buns ($1.50, ironicly)
4) A box of food coloring (or just blue if you can find it, 1$)
Step 1
Preheat the oven now. (follow the directions on your fries bag for temp. mine was 400)
Take the fries out of bag, put them in a large bowl and fill with warm water.
Add about 20 drops of food coloring, or until the water is an opaque blue. Let 'em soak for about 20 minutes.

Step 2
While your fries are soakin', get to work on those dogs. Same proceedure, except I used a glass instead of a giant bowl. Get the hotdogs out of the package, put them in a bowl or glass, fill with warm water and soak while your fries are prepping.

Step 3
Drain the fries, put them on a baking sheet, and get 'em in the oven, again, follow the bag directions. Mike took 20 minutes.

Step 4
Nuke your hotdog, and get it on the bun.

Step 5
I put blue fries in the back of my dog like spikes, feel free to serve yours how you see fit. It's your Sonic The Hedge-dog.

Enjoy!