You can alter he strength of the bite by changing the number of shells and amount of infill. MakerBot user recommendations are:
Replicator 2: Std. 0.2mm resolution / 3 shells / 30% fill / Raft / NO SUPPORT
5th Generation Models: Std. 0.2mm resolution / 4 shells / 35% fill / Raft / NO SUPPORT
If you want a weaker or stronger bite change the shells / infill to suit.
At standard size 'Eaglez' will bite okay onto little fingers. If you want to bite bigger fingers uniformly scale up as required (125% should bite most thumbs okay).
