Great Stranger Party Supplies, Balls in bulk for birthday parties, easy to use and inflate. Very soft Sparkly, stretchy, Squishy Ball Toys. Very Safe for Toddlers, Kids Teens and adults. MOTOR SKILL DEVELOPMENT: Gripping, tossing, bouncing, and rolling encourage growth of fine and gross motor skills. SENSORY ENGAGEMENT: Noisy, colorful pieces inside engage the senses and enhance auditory and visual development. ENHANCE LOGIC AND REASONING: Rolling, tracking, and bouncing enhance hand-eye coordination, visual sensory development, and logic & reasoning skills.