I've worked at Costco for 18 years. Here are 10 of the best things I'm seeing on shelves this month.

The Delta Children tree bookcase, which would make a great gift for kids, just arrived at my location.

The nearly 50-inch-tall structure can be used as a bookshelf, a toy-storage space, or even a plant display. At my store, this bookcase costs $120.

The Mush overnight oats come in handy when I need a quick, nutritious breakfast on the go. The variety pack includes strawberry, blueberry, and vanilla-bean flavors.

I especially love that the dairy-free oats contain 5 to 6 grams of protein and 4 to 5 grams of fiber per serving. An eight-pack of Mush overnight oats is $11.40 at my store.

Kirkland Signature morning buns are new to the Costco bakery this month. Each morning bun is buttery, made with orange zest and cinnamon, and topped with sugar.

A nine-pack of Kirkland Signature morning buns is $9 at my Costco.

The Ninja Creami Deluxe is perfect for turning fruit, beverages, and more into frozen treats this spring and summer.

Each box contains three 24-ounce pint glasses with lids and recipes to try. The ice-cream maker costs $180 at my Costco.

The Soules Kitchen flame-grilled chicken strips with sea salt and cracked black pepper are fully cooked and contain 20 grams of protein per serving. They're perfect for a quick meal or protein-rich snack.

My Costco sells a pack of two 16-ounce bags for $10.

The Gourmet Basics by Mikasa four-piece glass-tumbler set can make a great addition to a spring- or summer-glassware collection.

Each 18-ounce glass tumbler comes with a lid and straw, which is great for taking your drink to go. This glass-tumbler set is $13 at my store.

The Country Archer grass-fed mango-habanero beef jerky is a tasty, protein-rich snack with a hint of spice.

The jerky is gluten-free and has 10 grams of protein per serving. Each bag contains 16 servings and costs $13 at my Costco.

My Costco receives a shipment of 32 Degrees unisex cushion slides each year. This time, they're available in various colors I haven't seen before, including pink and cream.

The slides are super comfy, so they're suitable to wear while running errands or walking around the house. A pair costs $12 at my location.

The bouquet of Lego roses building set, recommended for ages 18 and older, has been super popular at my store since it hit shelves. It has 822 pieces to build 12 flowers that will never die.

My Costco carries a two-pack of the Lego set for $90.

The Zena Nutrition organic super greens fruit-and-vegetables powder helps me get my daily nutrients. When I want a sugar-free antioxidant boost, I add a pouch to a 10- to 12-ounce glass of water or a smoothie.

My Costco sells a package containing 45 servings for $35.