What craft supplies should you have on hand?

The families I have worked with usually tell me that they're unsure of where to start in buying art supplies.
They have been super sweet and given me free reign to buy what I need and they reimburse my receipts.

Here are the basics:

Paper! 

• Card Stock 
• This stuff always seems to be on sale at Jo-Ann Fabrics. It's nice because it's more durable than construction paper.
• You'll find it in the scrap booking aisle. 
• Last time we went, I got 5 packs for card stock for $10!!!!!! All different colors.
• Patterned paper
• The bigger stack was on sale for $10 also (half priced)- if it's not on sale, wait until it is or go on Jo-Ann Fabric's website. They have a 50% off coupon every month for one full priced item. 
• Construction paper 
• Kids craft aisle

Other Supplies: 

• Crayola markers 
• Crayons (for little ones- the thick ones) 
• A pencil and pencil sharpner
• A felt tip pen & medium sharpie
• Glue stick 
• Scissors
• String (yarn or string or embroidery thread- whatever)
• Tape 
• Kids LOVE tape
• I like to have a secret stash of nice tape (like Scotch tape) and then a kid's stash (I got 3 rolls of tape for a dollar at Daiso) 

Extras (if you're feeling adventurous): 

• A hot glue gun
• Pom poms
• Glitter glue (Not glitter- contain that stuff in some glue or you'll lose your mind-for real)
• Glue dots (if you really hate messes) 
• Tempera paint and brushes
• Elmers Glue, dixie cups, and a paint brush
• Color pencils
• Stickers 
• Painters tape 

Recycle!!! (What to save) 

• Baby food jars (snow globes)
• Egg cartons (sorting games) 
• Card board boxes (I built an play mailbox once that was dope!) 
• Paper tubes (marble tracks) 
• Plastic take-out containers (water toys)