Toshiki Hosoi Kazuki Takashima Tomoaki Adachi Yuichi Itoh Yoshifumi Kitamura A-blocks: recognizing and assessing child building processes during play with toy blocks. 1:1-1:2 2014 SIGGRAPH ASIA Emerging Technologies https://doi.org/10.1145/2669047.2669061 conf/siggraph/2014asiaemerging db/conf/siggraph/siggraph2014asiaemerging.html#HosoiTAIK14