Things you need:
Use a balloon pump (or your mouth) to blow up the balloons. Typically, I recommend getting at least two sizes and then I still blow them up all differently - some big, some smaller. Attach the balloons to the balloon tape (I like the one I linked because you can slide them into a smaller hole so that they are more secure). I tie a string through one of the holes and use a command hook to hang the arch by that string.
bears used for chocolate milk
bench: flea market | faux sheepskin & stool: IKEA | pillow: Maewoven | Camp Coen sign: I made it using canvas fabric, acrylic paint & a dowel. I hung it with the same command hooks linked above.
chalkboard: IKEA | chalk markers I use for all my chalkboard signs
piñata | dowel: Home Depot
books (linked in Amazon store)