it took 2 years
Questacon but if his birthday is in spring take to Questacon and floriaid
Questacon was created in 1986.
apparently Questacon was open in 1988 on the 23rd of November.
i am not sure but i know there is a big slide inside questacon
how long does it take to build a asimo
how long did it take to build the half moon
how long did it take to build the scottish parliment?
how long did it take to build cabot tower
for science
hs2 will take 15 years to build
how long does it take to build a beam bridge of 2400 sq ft
it took 3 years