4M Space Air Engine Kids Science Kit – Link

Amazon has this currently marked down to only $7.66.

• Perform various experiments, defy gravity and make the glow-in-the-dark ball float mid-air
• Teaches about bernouli’s airflow principle and other STEM based concepts
• Includes parts, ball and instructions.
• Requires two AAA batteries (not included)
• Recommended for age 8 years and up