If you are looking for water beads for sensory play, you can get 20,000(!) of them for just $6.99 right now on Amazon.

These highly-rated beads:

• Encourage Sensory Exploration: Fully expanded, these smooth, squishy beads create a soothing tactile experience. Ideal for children with sensory processing disorder & a
• 100% Money-Back Guarantee: We know you and your kids or students will LOVE these water beads. But if you’re not positively thrilled, let us know and receive a fast, no hassle refund.
• Promote Learning: Helps kids with color recognition, counting & fine motor skill and language development. Parents, teachers, and therapists love these beads for home & clinical use.
• Great for Wedding, Home, and general decorations. Or as a replacement to Orbeez
• Ideal for candle, silk & cut flower arrangements, centerpieces and more.