Assembling a Trisophy 3D puzzle is a very easy process.
Each piece has its number piece engraved between “<>” symbols.On each side also it’s engraved the number of the piece to be attached in that side.
So you only have to find the piece with the corresponding number to keep joining pieces and the 3D figure will appear as you join more pieces.
In each piece side there is a “notch” that matches perfectly with the other piece “notch” to ensure that both pieces are in the correct position before gluing.
In the following link you can download the Trisophy 3D assembly guide that it’s included in each 3D puzzle download and an assembly video example
Timelapse of Heart shell 3d puzzle assembly.