Answer: 1. Fire roasting.

　　The hard plastic toy is broken, so it can be baked and glued. First, put the two broken pieces of hard plastic toy together, then turn on the lighter, aim the flame at the fracture, wait for the hard plastic to melt and fix it, and turn off the lighter to blow out the flame, so that the toy can be glued firmly.

　　2, glue paste

　　The hard plastic toy is broken, so you can stick it with glue. Grind the broken parts of the toy smoothly, then apply glue to the broken parts at both ends, put them together, and squeeze them for one minute to close the broken parts.

　　3. Welding

　　Hard plastic toys are broken, and they can be glued together by welding. First, prepare a professional welding tool, and then use the tool to heat the fracture. During the heating process, assemble the other half at the heating place to make the hard plastic toy stick firmly.