If you are into science... especially chemistry and physics, then this is one of the most fun and exciting sited available in the U.S.A.
Here you can buy (with sufficient cash) infrared laser systems up to 100 watts in power. (yes, REAL 100W CO2 lasers) which can do a LOT of cutting and burning. Care should be taken when "playing" with the "toys" available from this site. They have 1100 mW blue lasers which are not de-rated like some other web sites (Chinese 1000 W in the ad but 750 mW in operation) advertise. You can also buy jet engines, and hi power rocket making kits there.
The chemicals and chemistry equipment are too numerous to list. Suffice it to say that you can buy almost anything you want, Alkali metals included. I have mainly purchased chemicals and glassware from them for my home lab. The equipment list includes distillation equipment (not available in Texas) and some interesting electrolysis equipment like the Hoffmann Aparatus.
The company started in business by supplying the Sandia National Laboratory with nuclear research supplies and equipment. As they expanded, many items sold to the nuclear research community are now available to us, the general public.
You can buy Spinthariscopes to track nuclear particles in a cloud chamber. They also sell non-enriched nuclear materials to the public. Many different isotopes of radioactive elements are available. Use good judgment, these materials can be hazardous in the wrong hands.
The most disconcerting listing they had was for U-238; Yes, naturally occurring Uranium 238. It is not regulated in smaller quantities. These materials should be carefully stored because of their potential radiation hazards.
The company recently moved from New Mexico to Michigan. Since then, they are completing a manufacturing facility to produce even more fascinating devices.
They have always made prompt shipments at decent prices, but remember that if you order hazardous materials, there are HazMat shipping surcharges required.
Overall, for a science nerd this site is an absolute must.
BTW, I am not sure if they will ship to Canada, there may be restrictions on that. I know they cannot ship to Europe.