Gee / Jee Boom Baa is a popular kids-special / novelty firecracker found in Sivakasi supplier catalogues and online cracker shops — typically a small, low-intensity item in the “kids items / stone / fountain” category. 
Often sold as a small fountain / stone / pop style novelty (produces short sparkles, crackle or a little pop) rather than a loud atom/bomb. Many shops group it with other children’s items like electric stones, peacock fountains and magic pops.
Marketed in boxes or packets; listings show single pieces, small boxes, and box bundles. Some sellers list 1 box = 50 pcs (or sold in multi-box bundles), while other shops sell single pieces/boxes too — packaging depends on vendor.
Retail prices vary widely by seller and pack size. Examples from current listings: ₹10–₹125 depending on unit/pack and discounts (many sites show heavy discounts during sales). Expect low single-piece prices for kids items and modest rates for 1-box or bundle packs.
Although typically low-intensity, it’s still a firecracker — use outdoors, keep away from children’s faces, do not hold while lighting, and follow manufacturer instructions. Confirm seller’s handling/shipping rules (many enforce minimum order amounts and treat online orders as enquiries due to legal transport rules).