These growing toys engage children by transforming capsules into mermaid figures when placed in water. Each set includes 2 packs with 12 capsules per pack, allowing for multiple uses and shared play. The capsules develop into colorful mermaids in shades of yellow, red, green, orange, and blue, appealing to a range of preferences. Suitable for parties, these mermaid toys work well as party favors for mermaid-themed events, fitting easily into goody bags. They also serve as stocking stuffers or Easter basket fillers. Designed for children ages 6 and up, they function as birthday gifts, holiday presents, or classroom rewards, adding an interactive element to science lessons.