each bag is approximately 5 g in weight. Once They have been soaked in water for around 12-16 hours, They will expand up to 200 x the original size. They will grow between 8 mm and 12 mm in diameter. Our Gel Soil will not leak any colour and is not fully toxic. Once hydrated, They will appear like crystals, although They are a polymer. jelly like INSTRUCTIONS Empty 5 g-each bag into a large container, add about half a litre of water per 5 g bag. soak overnight to Leave, or between 12 to 16 hours. Drain off any excess water. Once They have been on display for a week, They will shrink slightly. They will need additional water them to return to normal size.