another study done by jeffrey trawick-smith took 60 different children ages three to four and observed them playing with nine different toys deemed best for development. they were allowed to play with the toys in a typical environment, a preschool classroom, which allowed for the results to be more authentic compared to research done in a lab. the researchers then quantified play quality of the children with each toy based on factors such as learning, problem solving, curiosity, creativity, imagination, and peer interaction. the results revealed that boys generally received higher scores for overall play quality than girls, and the toys with the best play quality were those identified as the most gender neutral, such as building blocks and bricks along with pieces modeling people. trawick-smith then concluded that the study encourages a focus on toys which are beneficial to both genders in order to create a better balance.