1. Sketch Pad (2 Pack) 150 Sheets, 9x12, Premium Sketchbook 60 LBS/90 GSMS - Acid Free - Fine Tooth - Perfect for Sketching, Drawing, Doodling, & More! (Click Link to Check Price on Amazon)
Editor's Rating : 9.3 out of 10
BUY ONE GET ONE FREE - 2 Pack of 75 Page Sketchpads. 50% More than the Competition!High QUALITY 60lb (90GSMS) Paper - 100% Acid-Free and Neutral PH. Perfectly Textured for a Smooth Non-Reflective Finish

2. Strathmore Series 400 Sketch Pads 9 in. x 12 in. - pad of 100 (Click Link to Check Price on Amazon)
Editor's Rating : 9.1 out of 10
All-purpose paper intended for experimentation or perfecting techniquesIncludes 100 sheets of paper

3. U.S. Art Supply 9" x 12" Premium Manga-Marker Paper Pad, 60 Pound (100gsm), Pad of 24-Sheets (Click Link to Check Price on Amazon)
Editor's Rating : 9.5 out of 10
Acid Free, Neutral pH, Natural White Sheets, Ideal for Sketching and Mixed Dry MediaMarking Pen Paper with a Smooth Uniform Surface that is Virtually Bleedproof

4. 40 Art Gel Pens set for Adult Coloring Books In Storage Case Quality Markers In Glitter Neon Metallic Pastel Color (Click Link to Check Price on Amazon)
Editor's Rating : 8.8 out of 10
PREMIUM QUALITY: Smooth ink flow durable tips and long lasting ink. Colored pens that don't bleed or smear. Best gel pens for adult coloring books drawing sketching zentangle kit mandala grayscale bullet journaling scrapbooking doodling school projects or color by numberGORGEOUS COLORS: 40 vibrant artist colours including primary and secondary. Including Glitter pens set metallic pens set neon pens set gold silver white black and many more

5. US Art Supply Premium Spiral Bound Sketch Pad of 100 Sheets, 11" W x 14.6" L, 60 lb(100 GSM) (Click Link to Check Price on Amazon)
Editor's Rating : 9.9 out of 10
Acid free, neutral ph., spiral bound natural white sheets for easy removalStandard weight and versatile smooth paper made to accept all mixed media