Crime Related Information - Are fireworks legal in Connecticut? (1/1/2005) In general, fireworks are still illegal to buy, sell, possess and use. However, Public Act No. 00-198, which took effect June 1, 2000, legalized the sale, purchase and use of Sparklers by anyone age sixteen (16) years of age or older. Sparklers, as determined by the state, include sparkling devices of not more than one hundred grams of pyrotechnic mixture per item, which are non-explosive and non-aerial. These include the common stick sparklers and cone, base, spike and handle fountains. Smoke bombs, poppers, snakes, glowworms, and other novelty items are still illegal.