Elmer’s Liquid School Glue, Washable, Pack of 12 – Link

Amazon has this on sale for $9.61.

• Make Slime and bond materials like paper, Wood, fabric and ceramics
• Safe, Washable and non-toxic – ideal for children
• No-run formula is adjustable before setting and dries clear
• The #1 teacher Brand, it’s great for arts, crafts and School projects
• Smooth, classic white glue formula is perfect for making Slime at home or in the classroom!