Toddlers’ expressions indicate that they track agent–object interactions but do not detect false object representations

•Three-and-a-half-year-olds show suspenseful expressions when others approach deceptive objects.•Children under age 4 rely on records of others’ experiences when anticipating their (re)actions.•Children under age 4 do not yet understand deceptive appearances and their effect on agents’ object representations. In the theory of mind debate, a middle position between nativism and conceptual change theory has gained traction. This position states that children younger than 4 years track agent–object relations (by building “records” of others’ experiences) without cognizing how agents represent—or misrepresent—the objects they encounter. We tested these claims with 3.5-year-olds using puppet shows geared to evoke suspenseful expressions. In two experiments (N = 90), children watched an agent approach an object that looked like her favorite food but was inedible. In Experiment 1, children showed tense expressions when an agent’s real food item was, unbeknownst to her, replaced with a fake food item. Children, however, showed no signs of understanding that the agent would mistake the deceptive object for food. Consistent with this, children’s expressions in Experiment 2 did not differ when the agent approached a deceptive object compared with when she approached a non-deceptive object. The experiments support the middle position’s view that toddlers track agent–object interactions but fail to recognize when agents misrepresent objects.