Parents and children in the mindfulness intervention condition will be provided with a tablet and accompanying headphones, and will listen to pre-recorded audio of a mindfulness activity. There is a parent and child version of the mindfulness intervention. Both scripts were developed by Siegel and Bryson (2011), and include a parent and child version of a mindfulness activity targeting worries and anxiety. Adjustments to the child script were informed by the work of Petter and colleagues (2013). Adjustments to the parent script were informed by the work of Garland and colleagues (2015). This activity will last 5-minutes.

Parents and children in the unfocused attention condition will be provided with a tablet and accompanying headphones, and will listen to pre-recorded audio of an unfocused attention activity. There is a parent and child version of this activity. The parent version has been validated in other research with healthy adults as a control for a mindfulness intervention (Garland, Hanley, Farb, & Froeliger, 2015). This script was condensed in time from the original reading. The child version of the activity was developed for the current study, and was adapted from a mind-wandering script used for children aged 7-12 in past research (Spann, 2016). It was also informed by the unfocused attention script used for parents (Garland, Hanley, Farb, & Froeliger, 2015), and work by Cahn and Polich (2009). This activity will last 5-mintues.

Each script for the mindfulness-based intervention was slightly modified to fit the context of a venipuncture, and begins with instructions to take deep breaths. Both scripts aim to cultivate present moment awareness of experiences, curiosity, nonjudgement, and acceptance of experiences as they unfold. In particular, the scripts ask that the participant visualize their worries and feelings as a cloud in the sky, and probes for curious thoughts about these experiences. The temporary nature of sensations is described, and the participant is asked to keep this openness and curiosity during the venipuncture.

Between group changes in child self-reported pain as rated on a Numeric Rating Scale (NRS). The NRS has been used to assess pain intensity in children aged 7 and older during acutely painful procedures (Hsieh et al., 2017; Pagé, Stinson, Campbell, Isaac, & Katz, 2013; Vervoort et al., 2011).The NRS is rated on an 11-point numerical rating scale, ranging from 0 ("no pain") to 10 ("a lot of pain").

Between group changes in child self-reported fear as rated on a Numeric Rating Scale (NRS). The NRS has been used to assess child fear in children aged 7 and older during acutely painful procedures (Hsieh et al., 2017; Vervoort et al., 2011). The NRS is rated on an 11-point numerical rating scale, ranging from 0 ("not scared") to 10 ("very scared").

Between group changes in child perceptions of parent fear as rated on a NRS (researcher generated). Children will be asked to "Tell us how upset you think your parent was during the needle". This item will be rated on an 11-point numerical rating scale, ranging from 0 ("not at all") to 10 ("extremely").

Between group changes in parent report of child pain as rated on a NRS (Vervoort et al., 2011). Parents will be prompted to provide ratings corresponding to how much pain they think their child experienced. The NRS is rated on an 11-point numerical rating scale, ranging from 0 ("no pain") to 10 ("a lot of pain").