Check the listing for details. Molecular Visions Organic Chemistry Flexible Model Kit. Darling Models. Color: Multi-Coloured, Condition: Used, Made in Unknown. Listed at 9.99 USD. Pre-owned. 71 out of 73 pieces. Missing: -1x dbl bond pi piece, -rubbery pieces for strained bonds See pictures for details and condition. The Molecular Visions Organic Chemistry Flexible Model Kit by Darling Models is a high-quality educational toy suitable for teenagers aged 12 and above. This multi-coloured model kit allows students to visually explore the world of organic chemistry through building various molecular structures. With a focus on education and hands-on learning, this kit is a valuable tool for students looking to deepen their understanding of chemical reactions and bonding. Created in 1996, this kit has stood the test of time and continues to be a popular choice for those interested in science and nature.