The purpose of this study is to set up criteria for judging the mechanical features and the content of fourth-grade readers and to determine if the fifteen fourth-grade readers of this study fit these criteria.

This diploma thesis describes Rapid Prototyping methods. It introduces their overview, principles, advantages and disadvantages. This project also deals with aplication and comparison of modifications of samples made by Fused Deposition Modeling. Findings from tests of mechanical features (pulling test and bending test) are used for comparison.