During the Month of October Canada Post is offering free on Tuesdays shipping within Canada (see details below). This is only for one shipment per Tuesday, so first order of the day that gets the free shipping. The Kit will extend a 10% discount on all other orders receive on Tuesdays in October (whether they qualify for the Canada Post Free Shipping program or not) 
https://www.canadapost.ca/cpc/en/business/shipping/free-shipping-tuesday.page?ecid=murl|pdn|cd|164
