DIY coaster kit: NO CAULD AND GLUE INCLUDED.The coaster base and mosaic tiles are made of materials with smooth surface,very colorful,safe to use and odorless,suitable compatible withpeople who like DIY. Step-by-step instructions: Our mosaic craft kits come with detailed instructions,beginners can follow the instructions in the package to make it step by step.Suitable compatible withboys,girls and all ages,which is interesting and easy to make. Intersting crafts: If you are looking compatible witha unique craft and want to create a finished product that is both beautiful and functional,then you will love this kit.This kit not only allows you to feel the charm of handmade crafts, but also improves hands-on skills. Simple steps: The process of making it is very simple.Remove all materials and then use glue to secure the mosaic pieces to the coasters.Wear gloves and sponge the excess caulk until it dries so the unique coaster is complete. Widely used and perfect gift idea: The finished craft can be used as a coaster or elegant home decoration.This would be a meaningful gift with heartfelt compatible withfriends,family and some very important people. Mosaics are surprisingly easy and fun to make.Simple and clear instructional guides to learn mosaic making steps.The simple yet elegant design makes it the perfect gift compatible withany occasion.Have fun exploring a DIY craft with mosaics at home! Specification: Quatity: 3 sets Shape: square. Size: 3.9 inch/10 cm Material: wood colour: As shown Package Contents: 1 set x sea glass compatible withcrafts(The accessories are random/irregular, no specification is accepted) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.