You can find a detailed description of the Thing-a-ma-Jig kit here.

This list provides you with some information that can help in the assembly and launch of the Thing-a-ma-Jig:

• First, as with all of our kits, if you are preparing to teach a class with the TamJ we recommend that you build one yourself, well before the class, so that you can become familiar with the assembly and what your kids will be expected to do.
• Step 1 is the only step in this kit that requires the use of a razor knife (like the X-acto #11 knife). This step requires the builder to cut a small slit in the motor tube to accept the engine hook. The instructor, to eliminate the need of the class using a razor knife at all, can do this ahead of time. In fact, this slit can be made right through the bag containing the kit, if you wish.
• Step 5 has a centering ring modification that is best made with scissors. This can be a difficult step for younger children as the ring is thick and requires a bit of extra pressure to cut. The instructor can do this step quickly as the kids are performing steps 1-4. (NOTE: This modification is only performed on ONE ring)

• Step 8: This step has the kids putting marks on the fins to locate the “Glue Line” and the “Leading Edge” of the fin (NOTE: Future versions of this kit will have these marks already on the fins). It is important that the children perform this step properly to aid in assembly. Look over the figures and be sure that YOU understand where these marks go and that they are properly placed. NOTE: The “Glue Line” needs to be right against the edge of the slots in the fins as shown in the figure provided in the instructions.
• Steps 9-12: These steps are where the children will assemble their fin unit. It is important that they practice this step without glue before the final assembly. NOTE: A fin that is glued on upside down is NOT a problem. The model will assemble and perform just fine.
• Step 21&22: Engine mount installation. IMPORTANT: A common problem with engine mount assembly and installation is the lack of sufficient glue. Many times when preparing these models for flight it is discovered that the engine mount is loose in the body tube. This is unacceptable and the model cannot be flown that way. The instructions give good examples of what a “Glue Bead” looks like.
• Step 21&22 (again): If you apply the bead of glue inside the body tube, before threading the Kevlar® cord through the tube, you can get the cord throught the tube by taping a pencil to the end of the cord and droping it through the tube.
• Glue Fillets: It is important that, after the entire model has dried, adequate glue filets are applied to all joints where fins connect to other fins. Glue filets are made by applying a bead of glue along the full length of the joint then smoothing it out with the tip of your finger.