yes im sorry but that sight will not ship any grow kits to the united states. GOD click on the cubensis growbox and scrole down. it lists the countrys as follows. this is the exact list from the site
Shipping restrictions
Please check if this product is legal in your country. We cannot ship this product to Australia, Brazil, Canada, Croatia (Hrvatska), Czech Republic, Estonia, Finland, France, Hungary, Ireland, Italy, Japan, Latvia, Lithuania, Mauritius, Mexico, New Zealand, Norway, Poland, Portugal, Reunion Island, Russia, Slovenia, South Africa, Spain, Switzerland, Turkey, United Kingdom and United States.
your best bet is spores 101s site they have a US store and they have kits which are legal and ive done buisness with them plenty of times and there a very legit site. give you a tracking number and everything. they have a US store but its located in canada so everything gets shiped into the US up in washington then delivered whereever you live in the US. try them. you wont be disapointed. good luck