• Tristan Jacobson wants to change his surname to match his foster mum's (AAP)Source: AAP
Tristan Jacobson is helping his foster mum raise money to pay for his legal adoption. She says he "is already our son, in our hearts but we want to make it official.”
Bianca Soldani

26 Apr 2016 - 3:25 PM  UPDATED 26 Apr 2016 - 3:41 PM

A nine-year-old boy in Missouri, US, has helped fund his own adoption.

Tristan Jacobson has been in the full-time care of his biological father’s ex-wife since he was five and now wants to take her surname.

In order to do so, foster mum Donnie Davis and her new husband Jimmy have been hosting a garage sale to fund the legal fees necessary while Tristan sells $1 lemonades to people passing by.

After working through the weekend, the trio raised a total of $7,100 according to the Springfield News Leader, but the sum was far eclipsed by a separate crowdfunding campaign that they launched via YouCaring.com.

Over 300 donors reached into their pockets to collectively accumulate $16,000 to help Tristan officially become part of the family after a difficult childhood.

In the bio accompanying their fundraising page, Donnie explains that she was married to Tristan’s father when he had an affair with a teenager who fell pregnant.

Shortly after Tristan’s birth, his father was incarcerated and as his mother was unable to care for him, Donnie took kinship custody. At two and a half years old however, he was returned to his biological mother.

In early 2012, Donnie was contacted by authorities and informed that Tristan had been left at a homeless children’s centre. She retained primary custody from that day forward.

Since then Donnie explains that Tristan has needed to see a number of doctors and move from primary school to primary school as they dealt with behavioural issues stemming from his ADHD combined with impulse control disorder and depression, and post-traumatic stress disorder.

She is happy to report, however, that he is currently “doing phenomenal” and “getting 100 per cent at least three days a week for behaviour” at school.

Donnie adds that, “Tristan is already our son, in our hearts. But we want to make it official.” They now have the funds to do so.