Get up to 30% off National Geographic Science Kits at Amazon for Black Friday at Amazon. This is the best discount we've seen all season. This National Geographic Magic Chemistry Kit drops from $16.99 to $13.99. Similar kits are around $20, and this one is at least $15 elsewhere. Conduct 10 experiments, like making a coin float and creating snow. Prime members get free shipping. Non-members get free shipping at $35, otherwise it adds $6.99.