3D Printed Stamp

Above: The finished design from the lettering side

Challenge: Students wanted to produce a working stamp using the 3D Printer to produce a template for a stamp.
Background: This was part of the students process of designing for a Market Day that we are having at the school, where students run a business.   The students in this group have formed a group with the initials 'FBT' they were selling items in a regular paper bag, and as part of the presentation for the bag they wanted to create a stamp that would allow them to mark their work consistently.   The students were a mix of ten and eleven year old students who had a mixture of experience with 3D Printing.   The process to produce a stamp was extremely easy - the lettering was produced with the main Tinkercad interface, the lettering was introduced into the stamp and then the students started to investigate the need to reverse the lettering.   As with a lot of options on Tinkercad there was already icon which allowed the students to flip/reverse/mirror image the print on screen - this was simply done with a two click process which took the students in the region of three minutes to design.  The last aspect was simply designing something that would work with regards to the size, which the students had been aware of from previous projects.
Level of Difficulty: Low - the only issue here was the identification and the selection of the flip/mirror image icon, which is in the main interface of Tinkercad the rest of the design aspect was simply about selection a concept or design idea, which the students were able to come to the teacher and identify. 
Size: The print measures 120mm wide/across is 80mm high and the base is 5mm thick.  The lettering that is featured as the print font is 10mm high, 80mm across and 50mm high.  This task is all about creating a working stamp that can mass produce some individualized lettering.  This print was completed with a 4mm nozzle and printed with a 20% infill.
Time frame: This print came in at two and a half hours.  This was all about the lettering and the size of the stamp that the students wanted to produce.
What we would do differently/Next steps for the students: Students need to look at producing a handle on the other side (reverse) of the stamp to allow them to stamp effectively - it currently has a block at the back which while it will allow the students to operate the stamp on a pad would be better suited for handling if one was produced.    This is potentially a very good idea as it would allow the students or others a very easy way to customize something that could then have a practical application.  Testing with the students will show how successful the print is with ink - and paper, then we will also look at potentially changing the PLA or the thickness of the print (which is at a default of 4mm).