CLEVELAND — Walking down East 4th Street this week, pedestrians weave through Donald Trump supporters, police officers, protesters and television staging areas. Vendors sell water bottles to people strolling through temperatures of 80 degrees or more. A saxophonist plays "If I Only Had a Brain." The street, lined with bars and restaurants, sits near Quicken Loans Arena, home through Thursday night to the Republican National Convention. It is a hub of activity, a place where buyers can get more than their fill of Trump kitsch.

Trump Flake cereal for sale outside the GOP Convention in Cleveland on July 18, 2016. Jacob Pramuk | CNBC

Vendors sold "Make America Great Again" hats, "Hillary for Prison" pins and Trump bobbleheads. But they also displayed less conventional political merchandise. A table of "Trump Flakes" cereal sat just off of East 4th Street on Monday. The red box, plastered with a cartoon picture of Trump, features the slogan "They're gr-r-eat again!"

Condoms for sale outside the GOP Convention in Cleveland on July 18, 2016. Jacob Pramuk | CNBC

Comedian Eric Yesbick sold condoms featuring Trump, presumptive Democratic nominee Hillary Clinton and Sen. Bernie Sanders. The 29-year-old traveled from Georgia to sell the gag gifts and will be at next week's Democratic National Convention in Philadelphia. "You see a lot of hats, shirts and buttons, but I'm the only one with condoms," he said.

A woman sells Donald Trump merchandise outside the GOP Convention in Cleveland on July 18, 2016. Jacob Pramuk | CNBC