Down Quark
$11.99
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A tiny little point inside the Proton and Neutron, it is friends forever with the Up Quark. DOWN QUARK is also part of the Everyday Matter 6-pack and the Quark 6-pack.Approximately 2 oz (57 gm); 3 inches (6 cm)across.For ages 5 and up as it contains glued-on/small parts. CATEGORY: QUARKS
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