Goal:
What type of box do you use for the Riddler Device creation?
Answer:
You should search a home improvement supplies store such as Home Depot. Also you can go to a retail store but look for a box that is big enough to fit on the back.

Goal:
To cut a slot in a wooden shield, you can
Answer:
Use an oscillating saw to cut the slit

Goal:
To make a makeshift phone speaker,
Answer:
Get a toilet paper roll and make a slit on the top. Place your smartphone, speaker side down, into the tube. You can use push pins in the toilet paper roll for support.

Goal:
How do I clean sticky vinyl shelves?
Answer:
If the vinyl coating is sticky, dab a little of a citrus-based product used to remove sticker residue onto a paper towel. Wipe the entire shelf down if the whole shelf is sticky, or just the affected areas.