• 36 inches is about the height of a human 2 year old.
• Assuming average weight of a 2 year old is 30lbs.
• Assuming average body mass density is the same as water (1g/cm^3 ).

Then average volume of a 2 year old is:

(30lbs * 453.5924g/lbs) * cm^3 /1g = 13607.772cm^3

• Assuming volume is constant, but weight increased to 2 US tons

Then final creature density is:

(2 * 2000lbs * 453.5924g/lbs) / 13607.772cm^3 = 133.333...g/cm^3

That is about 6 times denser than the heaviest measured element and a little over half the density of the solar core.

I sincerely hope my math is right, but this is a shitpost and I didn't have paper so :shrug_emoji_1: