High quality DIY coaster kit: NO CAULD AND GLUE INCLUDED.The coaster base and mosaic tiles are made of high-quality materials with smooth ,very colorful,safe to use and odorless,suitable for people who like DIY. Step-by-step instructions: Our mosaic craft kits come with detailed instructions,beginners can follow the instructions in the package to .Suitable for boys,girls and all ages,which is interesting and easy to make. Intersting crafts: If you are looking for a 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 coaster is complete. Widely used and idea: The finished craft can be used as a coaster or elegant home decoration.This would be a meaningful gift with for friends,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 for any occasion.Have fun exploring a new DIY craft with mosaics ! Specification: Quatity: 3 sets Shape: square. Size: 3.9 inch/10 cm Material: wood colour: As shown Package Contents: 1 set x sea glass for crafts(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.