Thank you for your interest in Happy Atoms!
While we don't have an upgrade pack (from the Introductory Set to the Complete Set) available for purchase from retailers, we can sell you the additional atoms you need to complete your set.
Each additional atom costs $3.55 and there are 33 additional atoms that you need. Here is a breakdown of the additional atoms you'll receive and the cost.
Hydrogen (H) - 6
Helium (He) - 1
Lithium (Li) - 2
Beryllium (Be) - 2
Carbon (C) - 3
Nitrogen (N) - 1
Oxygen (O) - 4
Fluorine (F) - 2
Neon (Ne) - 1
Sodium (Na) - 1
Magnesium (Mg) - 2
Silicon (Si) - 2
Phosphorus (P) - 2
Sulfur (S) - 2
Chlorine (Cl) - 1
Argon (Ar) - 1
Total atoms: 33
Cost per atom: $3.55
Total cost: $117.15
We'll cover the cost of shipping and include the Happy Atoms satchel that the Complete Set comes with.
If you wish to proceed, we kindly ask you to send an email to support@thamesandkosmos.com with your mailing address and phone number and, once received, we will follow up with the next steps.
If you have any additional questions about this or any of our other kits, please do not hesitate to include them in your email.
The Thames & Kosmos Technical Support Team
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